386 lines
12 KiB
C
386 lines
12 KiB
C
/*
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u8g_com_arduino_t6963.c
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Universal 8bit Graphics Library
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Copyright (c) 2011, olikraus@gmail.com
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All rights reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice, this list
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of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright notice, this
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list of conditions and the following disclaimer in the documentation and/or other
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materials provided with the distribution.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND
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CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES,
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INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
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CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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PIN_D0 8
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PIN_D1 9
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PIN_D2 10
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PIN_D3 11
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PIN_D4 4
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PIN_D5 5
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PIN_D6 6
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PIN_D7 7
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PIN_CS 14
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PIN_A0 15
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PIN_RESET 16
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PIN_WR 17
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PIN_RD 18
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u8g_InitRW8Bit(u8g, dev, d0, d1, d2, d3, d4, d5, d6, d7, cs, a0, wr, rd, reset)
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u8g_InitRW8Bit(u8g, dev, 8, 9, 10, 11, 4, 5, 6, 7, 14, 15, 17, 18, 16)
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*/
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#include "u8g.h"
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#if defined(ARDUINO)
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#if ARDUINO < 100
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//#include <WProgram.h>
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#include <wiring_private.h>
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#include <pins_arduino.h>
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#else
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#include <Arduino.h>
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#endif
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#if defined(__PIC32MX)
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/* CHIPKIT PIC32 */
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static volatile uint32_t *u8g_output_data_port[8];
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static volatile uint32_t *u8g_input_data_port[8];
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static volatile uint32_t *u8g_mode_port[8];
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static uint32_t u8g_data_mask[8];
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#else
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static volatile uint8_t *u8g_output_data_port[8];
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static volatile uint8_t *u8g_input_data_port[8];
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static volatile uint8_t *u8g_mode_port[8];
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static uint8_t u8g_data_mask[8];
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#endif
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static void u8g_com_arduino_t6963_init(u8g_t *u8g)
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{
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u8g_output_data_port[0] = portOutputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D0]));
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u8g_input_data_port[0] = portInputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D0]));
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u8g_mode_port[0] = portModeRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D0]));
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u8g_data_mask[0] = digitalPinToBitMask(u8g->pin_list[U8G_PI_D0]);
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u8g_output_data_port[1] = portOutputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D1]));
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u8g_input_data_port[1] = portInputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D1]));
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u8g_mode_port[1] = portModeRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D1]));
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u8g_data_mask[1] = digitalPinToBitMask(u8g->pin_list[U8G_PI_D1]);
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u8g_output_data_port[2] = portOutputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D2]));
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u8g_input_data_port[2] = portInputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D2]));
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u8g_mode_port[2] = portModeRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D2]));
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u8g_data_mask[2] = digitalPinToBitMask(u8g->pin_list[U8G_PI_D2]);
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u8g_output_data_port[3] = portOutputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D3]));
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u8g_input_data_port[3] = portInputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D3]));
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u8g_mode_port[3] = portModeRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D3]));
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u8g_data_mask[3] = digitalPinToBitMask(u8g->pin_list[U8G_PI_D3]);
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u8g_output_data_port[4] = portOutputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D4]));
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u8g_input_data_port[4] = portInputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D4]));
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u8g_mode_port[4] = portModeRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D4]));
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u8g_data_mask[4] = digitalPinToBitMask(u8g->pin_list[U8G_PI_D4]);
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u8g_output_data_port[5] = portOutputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D5]));
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u8g_input_data_port[5] = portInputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D5]));
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u8g_mode_port[5] = portModeRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D5]));
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u8g_data_mask[5] = digitalPinToBitMask(u8g->pin_list[U8G_PI_D5]);
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u8g_output_data_port[6] = portOutputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D6]));
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u8g_input_data_port[6] = portInputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D6]));
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u8g_mode_port[6] = portModeRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D6]));
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u8g_data_mask[6] = digitalPinToBitMask(u8g->pin_list[U8G_PI_D6]);
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u8g_output_data_port[7] = portOutputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D7]));
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u8g_input_data_port[7] = portInputRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D7]));
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u8g_mode_port[7] = portModeRegister(digitalPinToPort(u8g->pin_list[U8G_PI_D7]));
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u8g_data_mask[7] = digitalPinToBitMask(u8g->pin_list[U8G_PI_D7]);
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}
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static void u8g_com_arduino_t6963_write_data_pin(uint8_t pin, uint8_t val)
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{
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if ( val != 0 )
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*u8g_output_data_port[pin] |= u8g_data_mask[pin];
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else
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*u8g_output_data_port[pin] &= ~u8g_data_mask[pin];
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}
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static void u8g_com_arduino_t6963_set_port_output(void)
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{
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uint8_t i;
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for( i = 0; i < 8; i++ )
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{
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#if defined(__PIC32MX)
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/* CHIPKIT PIC32 */
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*u8g_mode_port[i] |= u8g_data_mask[i];
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#elif defined(__AVR__)
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*u8g_mode_port[i] |= u8g_data_mask[i];
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#else
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/* TODO: use generic Arduino API */
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*u8g_mode_port[i] |= u8g_data_mask[i];
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#endif
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}
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}
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static void u8g_com_arduino_t6963_set_port_input(void)
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{
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uint8_t i;
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for( i = 0; i < 8; i++ )
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{
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#if defined(__PIC32MX)
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/* CHIPKIT PIC32 */
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*u8g_mode_port[i] &= ~u8g_data_mask[i];
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#elif defined(__AVR__)
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/* avr */
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*u8g_mode_port[i] &= ~u8g_data_mask[i];
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*u8g_output_data_port[i] &= ~u8g_data_mask[i]; // no pullup
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#else
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/* TODO: use generic Arduino API */
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*u8g_mode_port[i] &= ~u8g_data_mask[i];
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*u8g_output_data_port[i] &= ~u8g_data_mask[i]; // no pullup
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#endif
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}
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}
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static void u8g_com_arduino_t6963_write(u8g_t *u8g, uint8_t val)
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{
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u8g_com_arduino_t6963_write_data_pin( 0, val&1 );
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val >>= 1;
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u8g_com_arduino_t6963_write_data_pin( 1, val&1 );
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val >>= 1;
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u8g_com_arduino_t6963_write_data_pin( 2, val&1 );
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val >>= 1;
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u8g_com_arduino_t6963_write_data_pin( 3, val&1 );
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val >>= 1;
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u8g_com_arduino_t6963_write_data_pin( 4, val&1 );
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val >>= 1;
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u8g_com_arduino_t6963_write_data_pin( 5, val&1 );
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val >>= 1;
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u8g_com_arduino_t6963_write_data_pin( 6, val&1 );
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val >>= 1;
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u8g_com_arduino_t6963_write_data_pin( 7, val&1 );
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val >>= 1;
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u8g_com_arduino_digital_write(u8g, U8G_PI_WR, 0);
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u8g_MicroDelay(); /* 80ns, reference: t6963 datasheet */
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u8g_com_arduino_digital_write(u8g, U8G_PI_WR, 1);
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u8g_MicroDelay(); /* 10ns, reference: t6963 datasheet */
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}
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static uint8_t u8g_com_arduino_t6963_read(u8g_t *u8g)
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{
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uint8_t val = 0;
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u8g_com_arduino_digital_write(u8g, U8G_PI_RD, 0);
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u8g_MicroDelay(); /* 150ns, reference: t6963 datasheet */
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/* only read bits 0, 1 and 3 */
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if ( (*u8g_input_data_port[3] & u8g_data_mask[3]) != 0 )
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val++;
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val <<= 1;
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val <<= 1;
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if ( (*u8g_input_data_port[1] & u8g_data_mask[1]) != 0 )
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val++;
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val <<= 1;
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if ( (*u8g_input_data_port[0] & u8g_data_mask[0]) != 0 )
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val++;
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u8g_com_arduino_digital_write(u8g, U8G_PI_RD, 1);
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u8g_MicroDelay(); /* 10ns, reference: t6963 datasheet */
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return val;
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}
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#define U8G_STATUS_TIMEOUT 50
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static uint8_t u8g_com_arduino_t6963_until_01_ok(u8g_t *u8g)
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{
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long x;
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u8g_com_arduino_t6963_set_port_input();
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x = millis();
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x += U8G_STATUS_TIMEOUT;
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for(;;)
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{
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if ( (u8g_com_arduino_t6963_read(u8g) & 3) == 3 )
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break;
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if ( x < millis() )
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return 0;
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}
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u8g_com_arduino_t6963_set_port_output();
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return 1;
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}
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static uint8_t u8g_com_arduino_t6963_until_3_ok(u8g_t *u8g)
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{
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long x;
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u8g_com_arduino_t6963_set_port_input();
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x = millis();
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x += U8G_STATUS_TIMEOUT;
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for(;;)
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{
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if ( (u8g_com_arduino_t6963_read(u8g) & 8) == 8 )
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break;
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if ( x < millis() )
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return 0;
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}
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u8g_com_arduino_t6963_set_port_output();
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return 1;
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}
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static uint8_t u8g_com_arduino_t6963_write_cmd(u8g_t *u8g, uint8_t val)
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{
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u8g_com_arduino_digital_write(u8g, U8G_PI_A0, 1);
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if ( u8g_com_arduino_t6963_until_01_ok(u8g) == 0 )
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return 0;
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u8g_com_arduino_digital_write(u8g, U8G_PI_A0, 1);
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u8g_com_arduino_t6963_write(u8g, val);
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return 1;
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}
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static uint8_t u8g_com_arduino_t6963_write_data(u8g_t *u8g, uint8_t val)
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{
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u8g_com_arduino_digital_write(u8g, U8G_PI_A0, 1);
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if ( u8g_com_arduino_t6963_until_01_ok(u8g) == 0 )
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return 0;
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u8g_com_arduino_digital_write(u8g, U8G_PI_A0, 0);
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u8g_com_arduino_t6963_write(u8g, val);
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return 1;
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}
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static uint8_t u8g_com_arduino_t6963_write_auto_data(u8g_t *u8g, uint8_t val)
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{
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u8g_com_arduino_digital_write(u8g, U8G_PI_A0, 1);
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if ( u8g_com_arduino_t6963_until_3_ok(u8g) == 0 )
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return 0;
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u8g_com_arduino_digital_write(u8g, U8G_PI_A0, 0);
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u8g_com_arduino_t6963_write(u8g, val);
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return 1;
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}
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uint8_t u8g_com_arduino_t6963_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
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{
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switch(msg)
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{
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case U8G_COM_MSG_INIT:
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u8g->pin_list[U8G_PI_A0_STATE] = 0;
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u8g_com_arduino_t6963_init(u8g);
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/* setup the RW (equal to WR) pin as output and force it to high */
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if ( u8g->pin_list[U8G_PI_WR] != U8G_PIN_NONE )
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{
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pinMode(u8g->pin_list[U8G_PI_WR], OUTPUT);
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u8g_com_arduino_digital_write(u8g, U8G_PI_WR, HIGH);
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}
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/* set all pins (except WR pin) */
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u8g_com_arduino_assign_pin_output_high(u8g);
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break;
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case U8G_COM_MSG_STOP:
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break;
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case U8G_COM_MSG_CHIP_SELECT:
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if ( arg_val == 0 )
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{
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/* disable, active low chip select */
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u8g_com_arduino_digital_write(u8g, U8G_PI_CS, HIGH);
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}
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else
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{
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/* enable */
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u8g_com_arduino_digital_write(u8g, U8G_PI_CS, LOW);
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}
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break;
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case U8G_COM_MSG_WRITE_BYTE:
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if ( u8g->pin_list[U8G_PI_A0_STATE] == 0 )
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{
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u8g_com_arduino_t6963_write_data(u8g, arg_val);
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}
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else
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{
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u8g_com_arduino_t6963_write_cmd(u8g, arg_val);
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}
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break;
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case U8G_COM_MSG_WRITE_SEQ:
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{
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register uint8_t *ptr = arg_ptr;
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u8g_com_arduino_t6963_write_cmd(u8g, 0x0b0); /* auto write */
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while( arg_val > 0 )
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{
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if ( u8g_com_arduino_t6963_write_auto_data(u8g, *ptr++) == 0 )
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break;
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arg_val--;
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}
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u8g_com_arduino_t6963_write_cmd(u8g, 0x0b2); /* auto reset */
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}
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break;
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case U8G_COM_MSG_WRITE_SEQ_P:
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{
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register uint8_t *ptr = arg_ptr;
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u8g_com_arduino_t6963_write_cmd(u8g, 0x0b0); /* auto write */
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while( arg_val > 0 )
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{
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if ( u8g_com_arduino_t6963_write_auto_data(u8g, u8g_pgm_read(ptr)) == 0 )
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break;
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ptr++;
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arg_val--;
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}
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u8g_com_arduino_t6963_write_cmd(u8g, 0x0b2); /* auto reset */
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}
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break;
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case U8G_COM_MSG_ADDRESS: /* define cmd (arg_val = 1) or data mode (arg_val = 0) */
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u8g->pin_list[U8G_PI_A0_STATE] = arg_val;
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//u8g_com_arduino_digital_write(u8g, U8G_PI_DI, arg_val);
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break;
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case U8G_COM_MSG_RESET:
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if ( u8g->pin_list[U8G_PI_RESET] != U8G_PIN_NONE )
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u8g_com_arduino_digital_write(u8g, U8G_PI_RESET, arg_val);
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break;
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}
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return 1;
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}
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#else
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uint8_t u8g_com_arduino_t6963_fn(u8g_t *u8g, uint8_t msg, uint8_t arg_val, void *arg_ptr)
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{
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return 1;
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}
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#endif /* ARDUINO */
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